pyrogram/docs/source/start/invoking.rst
2020-08-22 16:09:38 +02:00

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Calling Methods
===============
At this point, we have successfully :doc:`installed Pyrogram <../intro/install>` and :doc:`authorized <auth>` our
account; we are now aiming towards the core of the library. It's time to start playing with the API!
.. contents:: Contents
:backlinks: none
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-----
Basic Usage
-----------
Making API method calls with Pyrogram is very simple. Here's a basic example we are going to examine step by step:
.. code-block:: python
from pyrogram import Client
app = Client("my_account")
with app:
app.send_message("me", "Hi!")
Basic step-by-step
^^^^^^^^^^^^^^^^^^
#. Let's begin by importing the Client class:
.. code-block:: python
from pyrogram import Client
#. Now instantiate a new Client object, "my_account" is a session name of your choice:
.. code-block:: python
app = Client("my_account")
#. The ``with`` context manager is a shortcut for starting, executing and stopping the Client:
.. code-block:: python
with app:
#. Now, you can call any method you like:
.. code-block:: python
app.send_message("me", "Hi!")
Context Manager
---------------
The ``with`` statement starts a context manager used as a shortcut to automatically call :meth:`~pyrogram.Client.start`
and :meth:`~pyrogram.Client.stop`, which are methods required for Pyrogram to work properly. The context manager does
also gracefully stop the client, even in case of unhandled exceptions in your code.
This is how Pyrogram looks without the context manager:
.. code-block:: python
from pyrogram import Client
app = Client("my_account")
app.start()
app.send_message("me", "Hi!")
app.stop()
Asynchronous Calls
------------------
In case you want Pyrogram to run asynchronously (e.g.: if you are using third party libraries that require you to call
them with ``await``), use the asynchronous context manager:
.. code-block:: python
from pyrogram import Client
app = Client("my_account")
async def main():
async with app:
await app.send_message("me", "Hi!")
app.run(main())
Asynchronous step-by-step
^^^^^^^^^^^^^^^^^^^^^^^^^
#. Import the Client class and create an instance:
.. code-block:: python
from pyrogram import Client
app = Client("my_account")
#. Async methods can't normally be executed at the top level, because they must be inside an async-defined function;
here we define one and put our code inside; the context manager is also being used differently in asyncio and
method calls require the await keyword:
.. code-block:: python
async def main():
async with app:
await app.send_message("me", "Hi!")
#. Finally, we tell Python to schedule our ``main()`` async function, which in turn will execute Pyrogram's methods.
Using :meth:`~pyrogram.Client.run` this way is a friendly alternative for the much more verbose
``asyncio.get_event_loop().run_until_complete(main())``:
.. code-block:: python
app.run(main())